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<h2 align="center">Jim's Page</h2>
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<h4 align="center">&nbsp;</h4>
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<p align="center">Chess IQ Test, Version 4</p>
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<p align="center">by Jim Monaghan</p>
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<p align="center"><font size="2">&nbsp;</font></p>
<p><font size="2">&nbsp;</font><a href="iq4.zip"><font size="2">Download
the IQ4 Test</font></a></p>
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<p>&nbsp;</p>
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<h4>Tactical IQ4 Test for Chess Programs</h4>
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<p>This test is based on a test suite from the master section of
Livshits' book
"Test Your Chess IQ". It has been debugged and improved. The positions
are
carefully balanced with medium to hard examples.
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Changes:
IQ to IQ2:
<ul>
  <li>I dropped 131 "easy" positions solvable in 4 ply or less</li>
  <li>I dropped 16 "hard" positions requiring 12 ply or more</li>
  <li>I dropped 12 "avoid move" positions due to their negative focus
Resulted in 360 positions down to 201.</li>
</ul>
IQ2 to IQ3:
<ul>
  <li>Andreas Hermann pointed out 6 duplicate positions. Resulted in
201 down to 195.</li>
</ul>
IQ3 to IQ4:
<ul>
  <li>Jon Dart pointed identified 7 problematical positions. Resulted
in 195 down to 188.</li>
</ul>
IQ5?
<ul>
  <li>I'm going to work on the 16 hard 12 ply problems. Ensure they are
correct, add them back in, and increase the rating range of the test.</li>
</ul>
<p>The test as presented here is intended to estimate the tactical
strength of chess engines. The test duration is 31 minutes and 20
seconds. Run the test on a chess engine at 10 seconds per position,
note the percentage score achieved and calculate the engine's IQ4
score:
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<p><b><font face="Arial" size="2">IQ4 score = (percent_correct x 6.7) +
1995</font></b></p>
<p><font face="Arial" size="2">The scoring range of the test suite is
from 1995 to 2641</font></p>
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<p>&nbsp;</p>
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<h4>Information and Improvements</h4>
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<p><font face="Helvetica,Arial" size="2">If you run the test and would
like to share your results please send them along.
If you find any alternative solutions or questionable ones please send
this data
so the test can be improved. My thanks to the posters at CCC and the WB
forum
for pointing out errors and omissions. Enjoy the test.
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<p><font face="Helvetica,Arial" size="2">&nbsp;</font></p>
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